96 lines
2.7 KiB
Python
96 lines
2.7 KiB
Python
import time
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from inventory import Inventory
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from network.downloadqueue import DownloadQueue
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from network.uploadqueue import UploadQueue
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haveBloom = False
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try:
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# pybloomfiltermmap
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from pybloomfilter import BloomFilter
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haveBloom = True
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except ImportError:
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try:
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# pybloom
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from pybloom import BloomFilter
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haveBloom = True
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except ImportError:
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pass
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# it isn't actually implemented yet so no point in turning it on
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haveBloom = False
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class BMQueues(object):
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invCleanPeriod = 300
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invInitialCapacity = 50000
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invErrorRate = 0.03
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def __init__(self):
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self.objectsNewToMe = {}
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self.objectsNewToThem = {}
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self.initInvBloom()
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self.initAddrBloom()
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def initInvBloom(self):
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if haveBloom:
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# lock?
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self.invBloom = BloomFilter(capacity=BMQueues.invInitialCapacity,
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error_rate=BMQueues.invErrorRate)
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def initAddrBloom(self):
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if haveBloom:
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# lock?
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self.addrBloom = BloomFilter(capacity=BMQueues.invInitialCapacity,
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error_rate=BMQueues.invErrorRate)
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def clean(self):
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if self.lastcleaned < time.time() - BMQueues.invCleanPeriod:
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if haveBloom:
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if PendingDownloadQueue().size() == 0:
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self.initInvBloom()
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self.initAddrBloom()
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else:
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# release memory
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self.objectsNewToMe = self.objectsNewToMe.copy()
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self.objectsNewToThem = self.objectsNewToThem.copy()
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def hasObj(self, hashid):
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if haveBloom:
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return hashid in self.invBloom
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else:
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return hashid in self.objectsNewToMe
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def handleReceivedObj(self, hashid):
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if haveBloom:
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self.invBloom.add(hashid)
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elif hashid in Inventory():
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try:
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del self.objectsNewToThem[hashid]
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except KeyError:
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pass
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else:
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self.objectsNewToMe[hashid] = True
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def hasAddr(self, addr):
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if haveBloom:
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return addr in self.invBloom
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def addAddr(self, hashid):
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if haveBloom:
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self.addrBloom.add(hashid)
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# addr sending -> per node upload queue, and flush every minute or so
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# inv sending -> if not in bloom, inv immediately, otherwise put into a per node upload queue and flush every minute or so
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# no bloom
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# - if inv arrives
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# - if we don't have it, add tracking and download queue
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# - if we do have it, remove from tracking
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# tracking downloads
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# - per node hash of items the node has but we don't
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# tracking inv
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# - per node hash of items that neither the remote node nor we have
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#
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